Grinding machine attachment



Feb. 6, 1940. F, HENRY 2,189,246

GRINDING MACHINE ATTACHMENT Filed Jan. 11, 1939 v 5 Sheets-Sheet 1 C d ln ventor Feb. 6, 1940. HENRY 2,189,246

GRINDING MACHINE ATTACHMENT Filed Jan. 11, 1939 s Sheets-Sheet Q2 Feb. 6, 1940.

E. F. HENRY GRINDING MACHINE ATTACHMENT Filed Jan, 11, 1959 3 Sheets-Sheet 3 Inventor A itorneys I 25 structure.

Patented Feb. 6,19 j. g

UNITEDSTATES PATENT OFFICE Y 2,189,246 t e GRINDING'MACHINE ATTACHMENT Elmer F. Henry, Baton, N. Mex. Application January 11, 1939, Serial No. 250,411

1 Claim.

This invention appertains to new and useful improvements in gauge attachments and more particularly to an attachment expressly adapted for use on grinding machines such as wheel 5 grinding machines whereby the grinding ma chine can be used for cutting grooves in cement floors and the like.

The principal object of the present invention is to provide a gauge attachment which can be '10 readily applied and removed with respect to the machine in a convenient manner.

Another important object of the invention is to provide such an attachment which will in no way cause alteration of the grinding machine. 15 Other objects and advantages of the invention will become apparent to the reader of the following specification. 1 a

In the .drawings-- Figure 1 represents a side. elevational view of 20 the attachment, the grinding machine being shown in broken lines.

Figure 2 is a side elevational view of the hood structure. v

Figure 3 is a bottom plan view of the hood Figure 4 is a top plan view of the hood structure. v f l Figure 5 is a section on the line 55 of Figure 2. n

30 Figure 6 is a perspective view of the clamp member. e

Figure 7 is a side elevational view of slide. Figure 8 is a top plan view of the slide. Figure 9 is an end elevational view of the slide. 35 Referring to the drawings wherein like numerals designate like parts, it can be seen that .the usualgrinder consistsof the motor housing 5 from which extends the conductor cord 6, and this housing 5 hasthe lugs '|--8 extending from 40 one end toembrace the gear box 9 through which a gear drive from the motor to the emery wheel I is located. A bolt extendsgthrough the slots at a portion of the housing or box 9 and at the upper portion of the box 9 is a handle I2. I 45 Thisbolt II also passes through the eye portions l3. and M of the legs l and I6 respectively which project from diametrically opposite points of the clamp'ring H, which clamp ring is made up of the two semi-circular sections a-b hinged- 50 ly connected together as at l8 and having their remaining ends provided .withnlugs |9 through which the contracting screw 20 is disposed. This collar I1 is adapted to be disposed around the motor casing as suggestedin Figure 1. 55 Theeye |3 has the extension 2| and this ex- The leg |5 also has the laterally extending 5 arm 25, the lug portion 26 of which is also welded or otherwise secured to theadjacent side of the A clamp member 21 having one end curved over one of its corners as at 28, has an opening 29 at its opposite end for receiving the bolt 30 which is also disposed through the extension 2| ofthe leg I5. l

This plate is adapted to engage against the upstanding slotted guide 3| to prevent vibration after the gauge slide 32 has been properly ad-- justed. The gauge slide 32 has the horizontal portion 0 and the inclined end portion d, the upper portion. of the inclined portion being bent backwardly as at 33. The side edges of the por tions '0 and d are rolled inwardly as at 34 to strengthen the slide. ;A second slotted guide 35 3 extends upwardly from the inclined portion (1 of the slide 32. The guide 3| extends upwardly at one side of the hood 24 while the guide 35 'extends upwardly at the opposite side of the hood 24 and the slotted guide 3| received. the threaded protuberance 36 projecting from one side of the hood 24 and which has the nut 31, while the slotted guide 35 receives the threaded protuberance 38 which projects from the opposite side of the hood 24 and hasthe nut 39. The guides 3| and allow for different depths of cuts.

Obviously, the relationship of the hood with respect to the slide or gauge 32 can be accurately 35 adjusted and these parts secured against further adjustment by the nuts 31 and 39 and the clamp plate 21.

The plates 32 forming the slide has the elongated narrow opening 40 therein extending across 40 the portions c and d and between the slotted guides 3| and 35.

Obviously with this attachment, cement floors,

newly laid, or old can be grooved in a quick and accurate manner in any desired design'and to 5 I any desired depth j j I While the'foregoing specification sets forth the invention in specific terms, it is to be understood Having described the invention, what is claimed as new is- An attachment for machines includ- T ing a grinding stone and a motor therefor; a grind wheel guard hood, a gauge plate having an inclined forward end portion, slotted arms rising from the plate, a clamp for embracing the motor, said clamp being attached to the hood and securing members disposed through the slotted arms and being connected to the hood for adjusting the distance of the plate below the hood, said clamp being of cage construction and divided into a pair of hingedly connected sections, one section of the clamp being attachable to one side of the motor and the other section being 5 attachable to the opposite side of the motor.

ELMER F. HENRY. 

